diff --git a/include/monflag.h b/include/monflag.h
index 93e681024..139cdfc6a 100644
--- a/include/monflag.h
+++ b/include/monflag.h
@@ -45,7 +45,8 @@
 #define MS_PRIEST 36    /* ask for contribution; do cleansing */
 #define MS_SPELL 37     /* spellcaster not matching any of the above */
 #define MS_WERE 38      /* lycanthrope in human form */
-#define MS_BOAST 39     /* giants */
+#define MS_MOO 39       /* minotaurs */
+#define MS_BOAST 40     /* giants */
 
 #define MR_FIRE 0x01   /* resists fire */
 #define MR_COLD 0x02   /* resists cold */
diff --git a/src/sounds.c b/src/sounds.c
index 3c5ac261a..97c655a7d 100644
--- a/src/sounds.c
+++ b/src/sounds.c
@@ -339,6 +339,9 @@ register struct monst *mtmp;
     case MS_WAIL:
         ret = "wail";
         break;
+    case MS_MOO:
+        ret = "low";
+        break;
     case MS_SILENT:
         ret = "commotion";
         break;
@@ -750,6 +753,12 @@ register struct monst *mtmp;
 #endif
         }
         break;
+    case MS_MOO:
+        if (!mtmp->mpeaceful)
+            pline_msg = "bellows!";
+        else
+            pline_msg = "moos.";
+        break;
     case MS_BOAST: /* giants */
         if (!mtmp->mpeaceful) {
             switch (rn2(4)) {